基金Supported by the Natural Science Foundation of China (70471045)Program for New Century Excellent Talents in University ( NCET-05-0557)+3 种基金A Foundation for the Author of National Excellent Doctoral Dissertation of PR China (200556)The Ph D.Programs Foundation of Ministry of Education of China ( 20060359007 )the Natural Science Foundation of Anhui Province(2006KJ248B)the Program for Youthful Teachers in the University of Anhui Province(2007jq1091)
